Insect metagenome
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA446029 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR7027890_1.fastq.gz | Fastqsanger.gz | |||
| SRR7027890_2.fastq.gz | Fastqsanger.gz | |||
| SRR7027900_1.fastq.gz | Fastqsanger.gz | |||
| SRR7027900_2.fastq.gz | Fastqsanger.gz | |||
| SRR7027891_1.fastq.gz | Fastqsanger.gz |
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Project description:Lyme borreliosis (LB) is a tick-borne infection caused by Borrelia burgdorferi. Dogs are at high risk of exposure to ticks and tick-borne pathogens, including B. burgdorferi. Immunodiagnostic assays are usually based on whole-cell preparations of B. burgdorferi as substrate and, consequently, interpretation of results is confounded by antibody cross-reactivity between borrelial antigens and other bacterial species, as well as the anti-LB vaccination status of the dog. For this study, we examined sera from 33 dogs that were experimentally infected with B. burgdorferi through tick bite. These sera were compared with sera from uninfected dogs in their reactivities to 72 different recombinant B. burgdorferi antigens and 24 OspC protein types on a protein microarray. Amongst antigens frequently recognized by infected dogs were several known to be immunogens for humans, such as Decorin-binding protein A (BBA25), BBA64, fibronectin-binding protein (BBK32), VlsE, Erp and Bdr, CRASP proteins, OspC proteins and some flagellar antigens. Of special interest were the novel antigens BBB14 and BB0844, both hypothetical lipoproteins about which very little is currently known, and that were frequently and strongly recognized by infected dog sera. The antibody response of B. burgdorferi-infected dogs presents both similarities and differences from human counterparts, and both can be important for improvement of canine LB diagnosis and vaccine development. Antibody profiling was performed on sera from dogs experimentally-infected with B. burgdorferi and unexposed controls against antigens of B. burgdorferi. Thirty-three serum samples from experimental infections, and 5 unexposed controls were probed on a protein microarray displaying 24 OspC proteins of B. burgdorferi .
2013-08-22 | E-GEOD-50075 | biostudies-arrayexpress
Project description:Lyme borreliosis (LB) is a tick-borne infection caused by Borrelia burgdorferi. Dogs are at high risk of exposure to ticks and tick-borne pathogens, including B. burgdorferi. Immunodiagnostic assays are usually based on whole-cell preparations of B. burgdorferi as substrate and, consequently, interpretation of results is confounded by antibody cross-reactivity between borrelial antigens and other bacterial species, as well as the anti-LB vaccination status of the dog. For this study, we examined sera from 33 dogs that were experimentally infected with B. burgdorferi through tick bite. These sera were compared with sera from uninfected dogs in their reactivities to 72 different recombinant B. burgdorferi polypeptides on a protein microarray. Amongst antigens frequently recognized by infected dogs were several known to be immunogens for humans, such as Decorin-binding protein A (BBA25), BBA64, fibronectin-binding protein (BBK32), VlsE, Erp and Bdr, CRASP proteins, OspC proteins and some flagellar antigens. Of special interest were the novel antigens BBB14 and BB0844, both hypothetical lipoproteins about which very little is currently known, and that were frequently and strongly recognized by infected dog sera. The antibody response of B. burgdorferi-infected dogs presents both similarities and differences from human counterparts, and both can be important for improvement of canine LB diagnosis and vaccine development. Antibody profiling was performed on sera from dogs experimentally-infected with B. burgdorferi and unexposed controls against antigens of B. burgdorferi. Thirty-three serum samples from experimental infections, and 6 unexposed controls were probed on a protein microarray displaying 72 unique proteins of B. burgdorferi .
2013-08-22 | E-GEOD-50074 | biostudies-arrayexpress
Project description:Ticks and Passerine bird blood microbiome Metagenome
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Project description:Detection of Theileria luwhenshuni in ticks infesting goats in Malaysia
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Project description:Powassan virus (POWV), a vector-borne pathogen transmitted by Ixodes ticks in North America, is the causative agent of Powassan encephalitis. As obligate hematophagous organisms, ticks transmit pathogens like POWV at the tick bite site, specifically during the initial stages of feeding. Tick-feeding and salivary factors modulate the host's immunological responses, facilitating blood feeding and pathogen transmission. However, the mechanisms of immunomodulation during POWV transmission remain inadequately understood. In this study, we investigated the global cutaneous transcriptomic changes associated with tick bites during POWV transmission. We collected skin biopsies from the tick attachment sites at 1-, 3-, and 6-hours post-feeding by POWV-infected and uninfected ticks, followed by RNA sequencing of these samples. Differentially expressed genes were analyzed for pathway enrichment using gene ontology and pathway enrichment analyses. Our findings reveal that tick feeding alone significantly impacts the skin transcriptome within the first 1 to 3 hours of tick attachment. Although early POWV transmission induces minimal changes in the local environment, a pronounced shift toward a proinflammatory state is observed 6 hours post tick attachment, characterized by neutrophil recruitment and interleukin signaling. These transcriptomic data elucidate the dynamic changes at the tick bite site, transitioning from changes that assist blood meal acquisition to a proinflammatory phase that may facilitate viral dissemination.
2025-02-05 | GSE282786 | GEO
Project description:Tick saliva contains many bioactive molecules that are involved in attachment to the host, blood feeding and transmission of pathogens. MicroRNAs (miRNAs) are a class of short non-coding RNAs with a length of 19-24 nucleotides. They act as regulators of gene expression by binding to their target mRNA at the post-transcriptional level and control a variety of cellular functions, including regulation of growth, metabolism, and development. The detection and characterizations of miRNAs from tick saliva may help explain the molecular mechanisms involved in the interaction between ticks, pathogens, and hosts. They may also contribute to the discovery of vaccines, which can control ticks and the pathogens they transmit. An RNA library was generated from the saliva of fed adult Haemaphysalis longicornis ticks, and it contained 17.4 million clean reads of 18-30 nucleotides. Overall, 319 known miRNAs and 1 novel miRNA were found. The 10 most abundantly expressed miRNAs present in tick saliva were miR-100_2, miR-315, miR-184_1, miR-100-5p_2, miR-5307, miR-184-3p_3, Let-7-5p_6, miR-71_5, miR-1-3p_6, and miR-10-5p_2. The miR-375, one of the abundantly expressed, was subjected to Quantitative Real-Time PCR analysis (qRT-PCR) in various tick developmental stages, as well as in different tissues isolated from adult ticks. The expression of miR-375 in different tick development stages was highest in unfed nymphs and lowest in the egg stage. In the tissues of adult ticks, miR-375 was most highly expressed in the salivary gland. To investigate the possible role of miR-375, Ant-375 was used to inhibit the miR-375. Treated group (Ant-375) had a reduced number of eggs (t(10)= 2.652, P=0.0242), eggs that were partially desiccated, and reduced egg hatchability (t(10)=2.272, P=0.044) compared to Ms-Ant and the non-injected control. This is the first study to investigate the miRNAs profile in tick saliva and the role of miR-375 in H. longicornis. The identification and characterization of miRNA in tick saliva may help to reveal the molecular mechanisms of interactions among ticks, pathogens, and hosts and suggest new vaccine strategies to control tick borne diseases.
2019-01-31 | GSE123407 | GEO
Project description:Tick-borne diseases (TBDs) are the most common illnesses transmitted by ticks, and the annual number of reported TBD cases continues to increase. The Asian longhorned tick, a vector associated with at least 30 human pathogens, is native to eastern Asia and recently reached the USA as an emerging disease threat. Newly identified tick-transmitted pathogens continue to be reported, raising concerns about how TBDs occur. Interestingly, tick can harbor pathogens without being affected themselves. For viral infections, ticks have their own immune systems that protect them from infection. Meanwhile, tick-borne viruses have evolved to avoid these defenses as they establish themselves within the vector. Here, we show in detail that infecting longhorned ticks with distinct arthropod-borne RNA viruses through two approaches natural blood feeding and injection, all induce the production of vsiRNAs. Dicer2-like homolog plays a role in regulating antiviral RNAi responses as knocking down of this gene enhanced viral replication. Furthermore, we demonstrate that tick antiviral RNAi responses are inhibited through expression heterologous VSR proteins in recombinant SINV. We identify both the virus and tick factors are critical components to understanding TBDs. Importantly, our study introduces a novel, in vivo virus-vector-mouse model system for exploring TBDs in the future.
2021-11-22 | GSE159277 | GEO
Project description:Understanding the molecular basis of how the tick adapts to feed on different animal hosts is central to understanding tick and tick-borne disease (TBD) epidemiology. Tick adaptation to feed on vertebrate hosts is regulated by tick secretion of multiple tick saliva proteins (TSPs) and other molecules that regulate tick feeding. This study was initiated to determine if ticks such as Ixodes scapularis and Amblyomma americanum that are adapted to feed on multiple hosts utilized the same sets of proteins to accomplish feeding on all hosts. Our data suggest that ticks of the same species differentially express proteins when feeding on diffent hosts. SDS-PAGE and silver staining analysis revealed unique protein eletrophoretic profile in saliva of Ixodes scapularis and Amblyomma americanum that were stimulated to start feeding on different hosts: rabbits, humans, and dogs. LC-MS/MS sequencing and pairwise analysis of proteins in saliva of I. scapularis and A. americanum ticks that were non-stimulated and those that were stimulated to feed on rabbits, dogs, or humans identified TSPs that were unique to each treatment and those that were common. Overal, we identified a total of 276 and 340 non-redundant I. scapularis and A. americanum TSPs, which we have classified into 28 functional classes that include secreted conserved proteins (unknown functions), proteinase inhibitors, lipocalins, extracellular matrix/cell adhesion, heme/iron metabolism, signal transduction and immunity-related proteins being the most predominant in saliva of unfed ticks. With exception of Rhipicephalus microplus, anti-tick vaccine research relies on feeding lab animals. Data here suggest that lab animal data could result in prioritizing irrelevant targets as some tick genes are unique to ticks fed on lab animals. This study provides the platform that could be utilized to identify relevant target anti-tick vaccine antigens, and will facilitate early stage tick feeding research.
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